Gas-engine.



j c. RG BINSON-Y .GAS ENGINE.

v APPLICATION FILED MAR. 13, 1900. 1,02 492 I Patented June 4, 1912.

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' La/ m c. ROBINSON. GAS ENGINE.

APPLIGATIOH FILED MAR. 13, 1900.

two cylinders, on

. part CYRUS ROBINSON, OF PITTSBURGH,

PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE MACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLV-ANIA.

GAS-ENGINE.

Specification of Letters Patent.

Patented June 4, 1912.

Application filed. March 13, 1900. Serial No. 8,526.

To all whom it may concern:

Be it known that I, CYRUS ROBINSON, a subject of. the Queen of Great Britain, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Gas-Engines, of which the following is a specification, reference being had therein to the accompanying drawing.

Figure 1 is va front elevation, partly in sect-ion, of a gas engine embodying my invention. Fig. 2 is a plan of the two cylinders and a portion. of thevalve operating mechanism. Fig. 3 is a horizontal section through one cylinder on the line III-III, Fig. 1. Fig. 4 is a vertical section of the line IV-IV, Fig. 2, show ing'the arrangement of ports and gas mixture admission valves. Fig. 5 is a vertical section of one cylinder through the cylinder exhaust valve and inlet check valve, the lower part on line V-V, and the upper on line V-V', Fig. 3. Fig. 6 is a cross sectional view through the supply connectionbetween the cylinders along the line VI, VI of Fig. 4:. v

Referring to the drawings, B and L indicate two connected cylinders fitted with pistons A and E. The spaces above the pistons constitute the combustion chambers, while in the spaces below the pistons, and by the downward movement of the] latter, the gas mixture for each cylinder is compressed by the piston of the other cylinder. Said cylinders are mounted on a suitable frame or base 1, preferably columnar in form and hollow. The main shaft is shown at P, mounted in the lower portion of the base, and has its, crank orwrist pins 3, 3 set opposite one another at an angle apart at 180 degrees so that the pistons move alternately. With these cranks the piston rods 4, 4 are connected by any well known or preferred means.

The gas mixture enters the engine by a from any suitable source pipe or coupllng. Y

which joins or is a part,,.'of the casing 5 of.

,the throttle valve G, which latter has a stem X that is tubular and passes vertically through the valve casing. Through this stem passes loosely the' vertical valve operating shaft T, driven from the engine shaft P by a spiral gear and pinion Q R. The valve gear lay shaft Dis suitably mounted between the cylinders at the upper end of the engine and has fixed thereon a bevel gear 2 which is driven by a bevel pinion Z on said shaft T. The parts of this gearing are of such ratio or proportions as to give the shaft D the same speed as that of the main engine'shaft P. The shaft D is provided with eccentrics or cams 6 arranged at proper angles to actuate the two cylinder admission valves N, H and two exhaust valves J, J. The stems of these valves are severally pressed upward to close the valves by springs 7, and have racks 8 engaged by gear. segment levels 9 by which the valves are periodically depressed and opened. The levers are severally operated for this purpose by the cams 6 which engage the lever arms 10.;

The governing means which I prefer, but on the particular construction of which the other features of my invention are not necessarily dependent, comprises a balance weight W adapted to slide on and rotate'with the shaft T and connected by arms 11 and a rotary joint 12 with the throttle stem X.

U, U, are governor arms fixed on the shaft T, and serving to suspend the balls V, V by links 13. The halls are also connected with the weight W by links 14. As the balls move outward by the acceleration of the engine and centrifugal force, the parts W, 11, X and G are raised and the mixture supply through the connection Y and casing 5 cut off or decreased.

From the casing 5 the explosive mixture passes into the lower end of the cylinders alternately by pipes, 15 and check valves F, being drawn in by the upward movements of the pistons.

The lower end of each cylinder is con nected by suitable ports and passages with thehadmission valve of the other cylinder. Thus, the cylinder B has at its lower end a port 16, passage 17 and port 18, preferablyv formed in thedouble cylinder head. The port 18 communicates'with an outlet l9'and thence, by the connection I, with the space M of the cylinder L. The cylinder L, it will be understood, communicates in a inlets or connections,

similar manner with the space M of the cylinder B. By these means the gaseous or explosive volume drawn into the lower ends pi'incipally (and alternately) into thespaces and M i The cylinder admission valvesare shown respectively at N and H in, or at. the upper en s of, the spaces M and M, controlling the admission of the mixture to the upper ends of the cylinders in the usual or" any preferred manner.

A charge of the mixture having been compressed, for instance by the piston A into Y the space M, the admission valve (in the instance supposed the valve H) is opened by the operation of the shaft Dw above described, and said mixture or the principal or; a suflicient part thereof is admitted into the clearance space 0 of the cylinder which 'is'left above the piston at thistime.

the operation of the shaft D and the prodnets of combustion allowed to escape from v the cylinder B through the passage 20 and ducts, through which respectively the exhaust outlet 21. The latter outlet also communicates by a passage 22 with the exhaust valve J of the cylinder L.

It will be understood that the above described cycle is repeated indefinitely in and.

by the cylinders B, L and pistons A, E, and cooperating passages and valves.

23 is a vertical partition in the connection, duct or pipe I in line, and joining similar 'partit ions 24 cast in the lower cylinder heads, whereby are formed through said connection two separate and inde endcnt and in the directions shown by the full and dotted arrows in Fig. 4) are compressed and driven the explosive charges for the storage spaces the said external chamber, and each cylin-1 oofder. having at its explosion end a head in the said inlet and exhaust ducts, a shaft parallel to' and'between the cylinders, valve or chambers M. M, as already described.

- What I claim is: I p v r 1. In an explosive gas engine, the combination of two cylinders arranged side by side, pistons within said cylinders dividing them'into explosion and compression chambers,-each cylinder having at lts compression end a head provided witha dut for the outw-ard passage of the compressed mixture and a duct for the inward passage of the uncompressed mixture, an external chamber for the mixed-gases connected to the said ducts'for the uncompressed mixture, a throt} tle valve for governing the gas supply for provided with an inlet duct for the compressed mixture and an exhaust duct, valves operating devices between the said shaft andv and connected to the sai The ignition of such mixture (the valve H havand a governor actuated b the said shaft throttle valve, substantially 'as set forth.

2'. In an explosive gas engine, the combi the two inletand the twoexhaust valves, 5

nation of two cylinders arranged side by side, oppositely moving pistons-therein and dividing the cylinders into compression and explosion chambers, two .ducts one leading from the compression-end of one cylinder to the explosion end of the other, and the other, leading from the compression end of thesecond cylinder tothe explosion end of the first, two independently movable ad mission valves arranged opposite each.other at the explosion ends of the cylinders, exhaust valves arrangedopposite to'each other at the said ends, a transverse valve shaft between the said admission and exhaust valves adapted to actuate the same, a throttle valve connected to the compression ends. of both of saidcylinders to control the intake of .ex-

plosive mixture thereto, a governor connected to said valve and an operatingshaft connected'to the said governor and the said transverse valve shaft, substantially as set forth.

3. In a gas engine, the combination of two parallel cylinders arranged side by side, pistons in the cylinders, a crank shaft, connections between the pistons and the crank shaft, a gas valve located between the cylinders, ducts leading from the valve to the cylinders at their inner ends, a continuously.

rotating shaft parallel to, the cylinders and located between them,-a governor on the shaft, connections between the governor and valve whereby the action of the latteris con trolled by the former, an intake valve and an exhaust valve located near the outer end of one cylinder, a slmilar intake'valve and asimilar exhaust valve located near the outer end of the other cylinder, across shaft lo- ,cated bet-ween the two cylinders and having connections with the aforesaid shaft to be continuously rotated thereby, and operative connections between thesaid cross shaft and the said valves whereby all of the valves are operated by the shaft in proper timed relation, substantially as set fo'rth.

4, In a gas engine, the combination of two parallel cylinders located side by side, 'pis- .tons in thecylinders, a'crank shaft, connec-. .tions between the pistons and the crank shaft, avalve for mixed gases between the cyl1nders, a shaft parallel to the cylinders and located between them, a governor controlled by the shaft, connections between the gover-.

nor and the valve whereby the former controls the latter, ducts leading from the valve tothe cylinders, inlet and exhaust valves ,for

one cylinder, similar intake and exhaust valves for the other cylinder, a cross shaft,

gearing between the cross shaft and the parallel'shaftwhereby the former is controlled by the latter,

' tons,

cross shaft whereby "the said inlet and ex-- haust valves of the'two cylinders are operated in proper timed relation, substantially as set forth. I

5. In a gas engine, the combination of two parallel cylinders, pistons one in each cyl'-- incler dividing it into explosion and compression chambers, a crank shaft, connections between the crank shaft and the piseach of the said cylinders having a gas intake duct connected with its compression chamber, an outlet duct for compressed gas connected with the compression chamber,

' and an inlet duct for compressed gas connected with the explosion chamber, the ends of said inlet and outlet ducts for compressed gas being immediately and a single unitary connection between the t-wo cylinders, the said connection having separate passages, one registering with the said outlet duct of one cylinder and the inlet duct of the other, and the other passage registering with the outlet ductof the second cylinder and inlet duct of the first, substantially as set forth.

adjacent each other,

In testimony whereof I aflix my signature witnesses.

in presence of two CYRUS ROBINSON. Witnesses:

H. HORNE,

M. L. ROWE. 

